Homework Help: Statistics

Posted by Andrea on Friday, March 15, 2013 at 10:59am.

A class has 3 sections. Here is a summary of the scores on the final exam.

Average SD Number of Students
Section 1 68 9 20
Section 2 75 9 25
Section 3 60 9 32

Find the average score of all the students in the class.

Statistics - PsyDAG, Friday, March 15, 2013 at 11:12am
Mean = ∑x/n --> n(mean) = ∑x

(68*20) + (75*25) + (60*32) = ?

Divide that by 20 + 25 + 32 = ?
Statistics - Andrea, Friday, March 15, 2013 at 11:48am
Thanks I got it

Answer this Question

Related Questions

Statistics - In Professor Smith's statistics course, the correlation between...
statistics - Answer the question(s) based on the following situation: 150 ...
statistics - Thomas needs a b in his class. his current test scores are 88, 83, ...
Statistics - In Professor White’s statistics course the correlation between...
statistics - The data below are the final exam scores of 10 randomly selected ...
stats - Relatively speaking, which statistics exam did you do better on? On ...
math - Statistics: Analyze student exam scores Students were given an exam with ...
social studies - The esteemed Dr. Bookworm has just completed a study in which ...
algebra - students in a biology class just took a final exam. a formula for ...
statistics - The heights of 1000 students in a college are normally distributed ...

For Further Reading

First Name:
School Subject:
Answer: